How does a secondary immune response differ from a primary immune response? a. l

Question

How does a secondary immune response differ from a primary immune response? a. lag period is shorter b. more antibodies are produced c memory cells are already present d. antigen is attacked faster e all of the above 60. Which cell is required for both antibody-mediated and cell-mediated immunity? a plasma cell b. cytotoxic T cell c. NK cell d. T helper cell e none of the above 61. In the activation of B cells, which substance is responsible for determining cell will proliferate and form a population? a. antigen b. interferon c. antibody d. complement protein e. ??? e MHn 62. A hypersensitivity is an immune response to a(a) a. antibody b. complement proteirn c. allergen d. pyrogen e. none of the above 63. A cell-mediated immune response would be most effective at eliminating a: a. bacterial toxin b. tumor cell c. circulating virus particle d. small, extracellular bacterium e. none of the above 4. Which of the following lists the structures in the correct order of airflow toward the lungs? a. pharynx; trachea; larynx; nasal cavity b. trachea; larynx; nasal cavity; pharynx c. nasal cavity; pharynx; trachea; larynx d. pharynx; nasal cavity; larynx; trachea e. nasal cavity; pharynx; larynx; trachea

Explanation / Answer

59. How does a secondary immune response differ from primary immune response.

e. all of the above

Note: Primary immune response happens when our immune cells recognize an antigen for the first time. Developing immunogenic response is much slower. After the memory cells have formed they produced antibodies much faster during the second time. So the antigen is destroyed faster.

60. Which cell is required for both antibody mediated and cell mediated immunity?

d. Helper T cells

Note: Helper T cells help activate B-cell in humoral immunity to secrete antibody. T helper cells also activate cytotoxic T cells, macrophages for cell-mediated immunity. Generally Th1 cells responsible for cell mediated immunity and Th2 cells responsible for humoral immunity generation.

61. In the activation of B cells, which substance is responsible for determining which B cell will proliferate and from a population?

a. Antigen

Note: The type of antigen determines what kind of B cells will be activate. It is the recognition of the antigen and antibody which determines the activation and proliferation of B cells.

62. A hypersensitivity is an immune response to a(n)

c. Allergen

Note: An allergen is a type of hapten. Haptens are generally non immunogenic. But immune system of some people are sensitive enough to generate immunogenic responses to allergen. Allergens are generally very tiny particles which can be inhaled or ingested. generally type 1 hypersensitivity is generated by allergen, called allergic response.

63. A cell-mediated immune response would be most effective at eliminating a

b. Tumor cell

Note: A tumor cell is altered self cell. An altered cell is generally destroyed by cytotoxic t cell or natural killer cells which is a cell mediated immunity.

64. Which of the following lists the structures in the correct order of airflow toward the lungs?

e. nasal cavity, pharynx, larynx, trachea

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